Circular saw



FIG. 1 is a top perspective view of a circular saw of the present invention;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

Any broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a circular saw, as shown and described. 